Recente 4. The four populations A, B, C and D are the same size and have the same range. Frequency histograms for the four populations are given below. A B C D (a) Each of the three box and whisker plots below corresponds to one of the four populations. Write the letter of the correct population under each plot. .. .. .. (b) Each of the three cumulative frequency diagrams below corresponds to one of the four populations. Write the letter of the correct population under each diagram